I would of course offer my skills however little they are. In a worse case senario i would be the only one on the plane who had any knowledge in aviation and would have to do every thing be myself including navigation, radios, and of course landing. On the other hand, there may be a more experienced pilot on board ,i would still offer my services as an f/o, monitor gauges, or even just look for traffic. Pretty much anything in my ability to help the successful landing of the aircraft.
P.S. What does question have to do with flight simulation?